how to harvest tomatoes?

You have to buy tomato seeds from vesta's farm first, you can talk to celia, vesta, or marlin. When they ask if you want to buy something, say yes, and choose tomato seeds. If you don't have enough gold(or "G") you can wait until the fat guy, van, opens his little store by ruby's house, and you can pick some flowers before that and then sell them. Then you can buy the tomato seeds and go back to your farm. You then have to find the squares or rectangles where you can plant things. Grab your hoe, and till one of the little squares. Then you can take out your tomato seeds, and plant them. You have to water them right after you plant them, and also whenever the soil looks dry. You should water them about twice a day. Then after the tomato gets big and bright red, you go over, press whatever button necessary, and then you have a tomato!